from it every year but now a new possible miracle shot that reduces your risk of heart attack by 90%. here to explain is the director of woman's heart health at lenox hill hospital. doctor, what do you mean a shot could be 90% effective possibly? >> what this shot does is change the mechanism of genes. we know the live produces cholesterol. what this shot does is actually turns off the gene that makes a liver make l.d.l. the bad cholesterol that leads to heart attacks. what trials have shown -- and these have been done in mice. but the trials have shown there is a 35% to 45% reduction in cholesterol. what this ends up doing is reduces the incidents of heart attacks by as much as 90%. >> we're going into the helix, let's look at our genes and say i might have